be.SIRAPRISE.typeimplementations

Class JOIN

java.lang.Object

be.SIRAPRISE.typeimplementations.RelationalOperator

be.SIRAPRISE.typeimplementations.JOIN

All Implemented Interfaces:

OperatorGenerator

@OperatorGeneratorCharacteristics(maximumArgumentCount=256,
                                  minimumArgumentCount=2,
                                  name="JOIN",
                                  signature={EXPRESSION,EXPRESSION})
public abstract class JOIN
extends RelationalOperator

JOIN

Author:

erwin

Constructor Summary

Constructors

Constructor and Description
JOIN()

Method Summary

Modifier and Type	Method and Description
static Relation	computeJoin(Relation relation, Relation joinWith)
static Relation	computeUsingJoin(Relation relation, Relation joinWith, java.util.LinkedHashSet<NameIdentifier> usingAttributes)
OperatorImplementation_V0105	getOperatorImplementation(OperatorGeneratorArgument[] args) Gets an implementation instance of the operator.

Methods inherited from class be.SIRAPRISE.typeimplementations.RelationalOperator

getInvocationName, getMaximumArgumentCount, getMinimumArgumentCount, getName, getOperatorGeneratorSignature, isMonoRelationOperator, toString

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

JOIN

public JOIN()

Method Detail

computeJoin

public static Relation computeJoin(Relation relation,
                                   Relation joinWith)
                            throws EvaluationException

Parameters:

relation - A relation to be joined with the other one

joinWith - The other relation, to be joined with the former one

Returns:

the result of joining the two given relations

Throws:

EvaluationException - If the evaluation fails for any reason

computeUsingJoin

public static Relation computeUsingJoin(Relation relation,
                                        Relation joinWith,
                                        java.util.LinkedHashSet<NameIdentifier> usingAttributes)
                                 throws EvaluationException

Parameters:

relation - A relation to be joined with the other one

joinWith - The other relation, to be joined with the former one

usingAttributes - the interval-typed attributes, in-order, that are to be applied in 'USING' mode by the join

Returns:

the result of joining the two given relations

Throws:

EvaluationException - If the evaluation fails for any reason

getOperatorImplementation

public final OperatorImplementation_V0105 getOperatorImplementation(OperatorGeneratorArgument[] args)

Description copied from interface: OperatorGenerator

Gets an implementation instance of the operator.

Parameters:

args - The arguments from which the instance is to be created. There must be exactly as many arguments as there are elements in the list returned from OperatorGenerator.getOperatorGeneratorSignature(). The correspondence between OperatorGeneratorArgumentType values and OperatorGeneratorArgument types is given in the table below :

correspondence between OperatorGeneratorArgumentType values and OperatorGeneratorArgument types

OperatorGeneratorArgumentType value	OperatorGeneratorArgument type
EXPRESSION	NonScalarOperatorGeneratorExpressionArgument
EXPRESSIONWITHSCOPE	NonScalarOperatorGeneratorExpressionArgument
STRING	NonScalarOperatorGeneratorTextArgument

Returns:

an instance of the operator